User`s manual

3.3 Hardware Conﬁguration

e. Make sure that the SIMM snaps into the metal locking clips on both

ends.

2. Connect a power supply to the Alpha PCI 64–275 motherboard, as shown

in Figure 3–1, with standard power to J29 and J31 and with +3.3Vdc

power to J27 and J28. If you use Digital’s recommended power supply,

connect P8—J31, P9—J29, P11—J27, and P12—J28. J29 and J31 are

mounted inline to appear as a single 12-pin connector on the board, but

accept two 6-pin plugs.

Caution

The four power connectors are not keyed, so pay particular attention to

Figure 3–1 when installing them.

3. If you are using an enclosure, mount the 3.5-in diskette drive, hard drive,

and CD–ROM drive. Refer to the manufacturer’s instructions for installing

these devices.

4. Connect the 3.5-in diskette drive. The 34-pin diskette drive cable goes from

connector J24 on your Alpha PCI 64–275 to the diskette drive. The drive

should be connected at the very end of the cable closest to the twist in the

cable. Make sure to insert the connector in the proper orientation so that

pin 1 on the cable matches pin 1 on the board header (as indicated on the

board). Pin 1 is identiﬁed on the board with a v symbol. Attach a power

connector to the drive.

5. If you will be using any SCSI devices, such as a SCSI CD-ROM drive or

hard disk, install the SCSI controller in any free PCI or ISA slot. Then

connect the drives, being sure only the last drive connected to the cable is

terminated, or use a cable terminator if the last drive does not have SCSI

bus termination capability. Follow the drive manufacturer’s installation

instructions to set each drive on the bus to a unique ID number and each

drive except the last to non-terminated. The primary drive on the bus

shold be a hard drive.

6. If you will be using one or more IDE CD-ROMs, hard drives, or other IDE

devices, attach your IDE cable to connector J26 in the proper orientation.

An IDE hard drive should be conﬁgured as the primary device on the IDE

bus. Refer to the manufacturer’s instructions for setting up the hard drive.

Starting and Using the Alpha PCI 64–275 3–3